Flier for roving-machines.



No. 803,666. PATENTBD Nov. '7, 1905.

M. CAMPBELL.

PLIER FOR ROVING MACHINES.

APPLICATION FILED JAN. 3. 1902.

2 SHEETS-SHEET 1.

N0. 803,666. PATENTED NOV. 7, 1905. M. CAMPBELL.

FLIER FOR ROVIN'G MACHINES.

APPLIATION FILED JAN. 3. 1902.

2 SHEETS-SHEET 2.

WITNEESEEr UNITED sTATns PATENT OFFICE.

Speccaton of Letters Patent.

Patented Nov. '7, 1905.

Application lled January 3, 1902. Serial No, 88,330.

To @ZZ 1072/0171/ it may concer-71,.

Be it known that I, MALCOLM CAMPBELL, of Boston, in the county ofSuHfolk and State of Massachusetts, have invented certain new and usefulImprovements in Fliers for Roving- Machines, of which the following is aspecilication.

This invention has relation to fliers for roving-machines, and has forits object to remedy the defects found in such devices and to providecertain improvements therein by means of which the yarn will be builtupon the bobbin more evenly than has heretofore been possible. It hasbeen customary to provide the Hier with a finger supported upon thethreadcarrying arm and having its free end resting upon the bobbin orthe yarn thereon,.so as to move outward as the'bobbin is Hlled. Whilethis contrivance has in a measure served its purpose in laying the yarnupon the bobbin, yet it has been objectionable in that it has not beenpossible to build the yarn upon the bobbin with the same degree ofcompactness throughout by the use thereof. This has been due to the factthat as the end of the finger was moved radially outward, owing to theaccumulation of yarn on the bobbin, the tendency of the linger to Hyoutward under centrifugal action increased more and more, andconsequently the pressure of the linger upon the yarn decreased to thesame extent, whereby the yarn upon the bobbin decreased in compactnessas it increased in depth or thickness. It has therefore been thepractice to mount the presser-linger upon one side of the Hier and toweight the opposite side of the Hier for the purpose ofcounterbalancing` said linger.

This expedient has not proved entirely satisfactory, since the movementof the finger ou tward or inward destroys the balance and causes theHier to chatter upon its bearings and to rotate out of true.

For'the purpose of remedying the evils to which reference has beenspecifically made the present invention contemplates the employment of adiHierential pressure device for eX- erting a variable leverage on thelinger and counter-balancing. the increased centrifugal force as theyarn increases upon the bobbin and the linger is moved outward, inconsequence of which the pressure of the free end upon the bobbin andthe yarn thereon remains constant at all times, whether the bobbin berelatively full or empty.

The invention further contemplates the employment of a movablecounterbalance for the linger and the differential pressure mechanism,so that the Hier remains at all times perfectly balanced and is therebyenabled to rotate evenly and uniformly.

Referring to the drawings, Figure l represents a Hier constructed inaccordance with my invention as it appears when operating upon an emptybobbin. Fig. 2 represents the same with the linger in position toaccommodate a full bobbin. Fig. 3 represents an edge view of the same.Fig. 4 represents a section on the line 4 t of Fig.`2. Fig. 5 representsa plan View of the Hier. Figs. 6, 7, and 8 represent other embodimentsof the invention.

Referring to the drawings, a indicates the Hier-spindle, having the twoarms e c, which are exact counterparts of each other, each being hollowfor the reception of the roving and its passage therethrough.

CZ represents a finger which is bifurcated or forked to straddle the arme, being fulcrumed upon the studs CZ, extending laterally from the saidarm. Upon the studs c' on the arm c is similarly mounted or fulcrumed alinger c2, which is exactly similar to that at CZ. The two fingers d andc2 are each provided on their free ends with a curved Hattened tip fr torest upon the yarn which accumulates upon the body, each tip beingprovided with a threadeye through which the yarn may be passed from thehollow linger Z or c2, as the case may be. Each Hnger is relativelylong, so that as the yarn accumulates. upon the bobbinitmay move outwardfrom the position shown in Fig. 1 to that shown in Fig. 2, the yarn inthe meantime passing through one of the fingers and the hollow arm onwhich the linger is fulcrumed. Each of the fingers is provided with anupward extension y, having a cam-surface to bear against the cam edge ofa lever e'. Each of the said levers e is fulcrumed upon a stud e',attached to one of the arms or c, said levers extending in oppositedirections, as shown in Figs. 4 and and being curved outwardly toaccommodate the bobbin and the yarn thereon. The stud .2" is in eachcase threaded into a lug z2, projecting inwardly from the arm. Upon thelonger end of each of the levers .e there is a weight .'23, which whenthe parts are at rest throws the longer end of the finger cl or c2, asthe case may be, toward the position shown in Fig. l or toward thecenter of gravity of the Hier. The contacting edges or surfaces of thelever z and the extension y of the linger are such that the point ofcontact when the tip is moved IOO inward as against an empty or nearlyempty bobbin is relatively near the stud d or c, as the case may be; butas the said finger-tip moves outward the point of contact recedes fromthe said studs and approaches the studs z, so that although the weightedend of the lever ,e is raised in each case, yet the leverage of thelinger upon the lever .e decreases gradually, and greater force istherefore necessary to raise the weighte as the linger Z or c2 movesoutward from the center of the bobbin or away from the center of gravityof the flier. Therefore as the centrifugal force increases with theoutward movement of each of the fingers it is oset or balanced by theincrease in power necessary to raise the weighted end of the lever e,and therefore the tip of each of the lingers rests upon the bobbin witha constant pressure. The yarn may be passed through either of the armsand fingers, the other arm and linger exactly counterbalancing the onelirst mentioned, so that as the linger d swings outward and the weighte3 of one of the levers z is raised the finger c2 will likewise swingoutward to raise the other weight, there being thus provided a truebalance, which enables the accurate and even rotation of the flier.

In Fig. 6 each of the fingers is provided with an eccentric gear-segmentp, intermeshing with a segment p on the lever The pitch-line of eachsegment is an involute curve. so that as the finger swings outward thepressure necessary to raise the weighted lever increases.

In Fig. 7 the fingers qand the weighted levers r have a pin-and-slotconnection by which the same results may be accomplished as when thelingers and levers are provided with the contacting cam-surfaces.

In Fig. 8 each linger s has the cam eXtension y, similar to that shownin Fig. l, there being a leaf-spring t bearing against the edge of thesaid extension, the engaging surface or edge of eachlinger being soformed that as the finger-tip swings outwardly the point of contact ofthe spring with the said edge moves toward the fastened end of thespring to increase the tension of the latter.

It will be observed that in all of the cases referred to the parts areaccurately balanced and that there is a variable leverage mechanism ordifferential pressure device for exerting a variable leverage on thelinger and counterbalancing the increased centrifugal force as the freeend of the finger moves outward, due to an increased accumulation ofyarn on the bobbin.

Having thus explained the nature of the invention and described a way ofconstructing' and using the same, although without attempting to setforth all of the forms in which it may be made or all of the modes ofits use, I declare that what I claim isl. A flier for roving-machineshaving a linger whose free end is adapted to rest upon the bobbin or theyarn thereon, and variable leverage mechanism for counterloalancing theincreased centrifugal force as the free end of the linger moves outward,due to an increased accumulation of yarn on the bobbin.

2. A liier for roving-machines having a linger whose free end is adaptedto rest upon the bobbin or the yarn thereon, and a differential pressuredevice exerting a variable leverage on said finger whereby the pressureof the free end of said finger on the yarn on the bobbin remainsconstant irrespective of the depth of the yarn on the bobbin.

3. Aflier for roving-machines having a pivoted finger whose free end isadapted to rest upon the bobbin or the yarn thereon, and a differentialpressure device arranged across the top of the liier and engaging saidlinger` the point of contact between said device and said linger varyingas the free end of the linger moves outward.

4. A flier for roving-machines having a finger whose free end is adaptedto rest upon the bobbin or the yarn thereon, and a weighted leverengaged with said finger, with provisions whereby the leverage of saidfinger on said weighted lever decreases as the free end of the lingermoves outward from the center of the bobbin.

5. Allier for roving-machines having a finger whose free end is adaptedto rest upon the bobbin or the yarn thereon, and a weighted lever havingafiXed pivotal relation to said finger but having a point of contactwith said linger which approaches the pivot of said lever as the freeend of said finger moves outward.

6. A flier having an arm, a finger pivoted on said arm, and a weightedlever pivoted on said arm and having a point of contact which approachesthe lever-pivot as the free end of the finger moves outward.

7. A flier having an arm, a linger pivoted on said arm, and a leverpivoted on the arm having a weight at its free end, said finger bearingagainst the weighted lever.

8. A flier having a pivoted linger and a pivoted weighted leverextending across the top of the liier, said finger engaging said leverlifting the weight thereon as said finger moves outward.

9. A liier for roving-machines having a pivoted linger whose free end isadapted to rest upon the bobbin or the yarn thereon, and movable means,moving toward or from the center of gravity coincidently with the saidfinger to balance the same.

10. A liier for roving-machines having a finger whose free end isadapted to rest upon the bobbin or the yarn thereon and to move outwardas the yarn accumulates, and means attached to the liier diametricallyopposite the said finger and having provisions for moving toward or fromthe center of gravity coinci- IOG IIO

dently with the movement of the said linger for counterbalancing thesame.

11. A flier for roving-machines having two I opposite pivoted arms whichare counterparts each linger moves outward, each arm and linger and eachcounterbalancing means being Similar to the other arm, finger, andcounterbalancing means respectively.

13. A flier for roving-machines having a pivoted pressure-finger withprovisions for engaging one end of said finger, whereby the flier isbalanced irrespective of the movement of said finger relative to thecenter ot' gravity.

In testimony whereotl l have afllxed my signature in presence of twowitnesses.

MALCOLM CAMPBELL.

Witnesses:

M. B. MAY, C. C. STECHER.

